Crown Battery 55S

Warning: This test requires trained personnel with PPE!

Specific gravities at manufacturers specifications?

If not, adjust the specific gravities accordingly.

Battery cooled down to 75°F to 85°F?

If not, allow the battery to cool down before testing.

Battery discharged within 24 hours of completion of charging and acid adjustment?

If not, discharge the battery within the specified time.

Any dead cells taken out of circuit?

Warning: This procedure requires trained personnel with PPE!

Proper electrolyte level maintained

Charger controls and instruments checked and calibrated

Battery not discharged over 80% state of charge

- Test batteries using three testing instruments

- The specific gravity and open circuit voltage readings are normally in direct proportion to each other; consequently, a voltmeter or hydrometer can be used to check the battery

- The use of the voltmeter is a faster method of approximating the individual cell state of charge and can reduce dramatically the time required for routine battery checking. When using the voltmeter method, take specific gravity readings on the two cells having the highest and lowest voltage readings

- This will confirm both cells state of charge and accurately pinpoint the difference in the state of charge between them. The voltmeter is used when on‐charge or on‐discharge voltage readings are needed

- A battery thermometer is read like a normal thermometer. A proper thermometer should have specific gravity correction marked on its scale

- The hydrometer has an extra‐long scale to make readings more accurate. For ease of correcting for temperature, the specific gravity corrections are marked on the scale of the thermometer. The cell tester (voltmeter) has a 1.5 to 3.0 volt scale and an easy‐to‐handle, one‐piece terminal probe;

Check uniformity of battery cells

Enter the state of charge of the cells

Select the battery operation type

Note: Unnecessary equalizing charges can result in significant loss of battery life caused by overcharge.

Sign off on the battery maintenance

Warning: This procedure requires trained personnel!

Enter the current battery charge in amperes

If the charger is rated higher than the connector on the battery, proceed with the following modifications:

After modifications, adjust the charger settings as needed.

Did the battery reach 80% charge in two hours or less?

Sign off on the battery opportunity charging